An old — on second thought, make that “very old” — Sony AM/FM broadcast transistor, which I somehow acquired, finally got a little too cranky for me, Figure 1. The analog-dial tuning knob was sluggish ...

As transistor radios and their price tags got smaller, music stations on AM radio grew in popularity. As hard as it might be to believe, it was not so long ago when AM radio ruled. Cool kids listened ...

With its "genuine superheterodyne circuit" and "standard 22½-volt battery," the Regency TR-1 not only launched portable audio, it also brought us gobbledygook technospeak. The Regency was the first ...